* Oops in vanilla 2.4.22 serial-usb driver
@ 2003-09-25 4:17 Philippe Troin
2003-09-25 18:50 ` Greg KH
0 siblings, 1 reply; 7+ messages in thread
From: Philippe Troin @ 2003-09-25 4:17 UTC (permalink / raw)
To: linux-kernel; +Cc: greg
This happened at the end of a Palm sync.
The machine went on, but USB is not irresponsive to USB attach/detach
since khubd is dead. The USB low-level driver is UHCI_ALT, compiled
in-kernel.
BTW, is there any way to restart khubd without rebooting?
Phil.
Kernel info:
vanilla 2.4.22 + vfs-lock + lvm-1.0.7 + kmsgdump 0.4.4
Linux ceramic 2.4.22 #1 SMP Tue Sep 16 18:14:44 PDT 2003 i686 unknown
Oops:
Unable to handle kernel NULL pointer dereference at virtual address 000009a4
ed341d05
*pde = 00000000
Oops: 0002
CPU: 1
EIP: 0010:[<ed341d05>] Tainted: P
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010246
eax: 00000000 ebx: dae4bc90 ecx: 00000046 edx: 00000001
esi: 00000002 edi: dae4bc00 ebp: 00000000 esp: e7d1df48
ds: 0018 es: 0018 ss: 0018
Process khubd (pid: 10, stackpage=e7d1d000)
Stack: ed342e20 d16591e0 ed342e40 c01f2fd0 ce5eac00 dae4bc00 00000100 00000002
e7d2b000 00000001 00000000 ce5eac00 c01f539e e7d2b114 00000001 00000002
e7d2b000 e7d1f8a0 00000001 00000001 0000000a c01f565d e7d1f8a0 00000001
Call Trace: [<ed342e20>] [<ed342e40>] [<c01f2fd0>] [<c01f539e>] [<c01f565d>]
[<c01f584b>] [<c0105a54>]
Code: c7 80 a4 09 00 00 00 00 00 00 8d 4b 5c f0 ff 43 5c 0f 8e ae
>>EIP; ed341d05 <[usbserial]usb_serial_disconnect+6d/1ec> <=====
>>ebx; dae4bc90 <_end+1aae7f44/284a02b4>
>>edi; dae4bc00 <_end+1aae7eb4/284a02b4>
>>esp; e7d1df48 <_end+279ba1fc/284a02b4>
Trace; ed342e20 <[usbserial]usb_serial_driver+0/0>
Trace; ed342e40 <[usbserial].data.start+20/3c>
Trace; c01f2fd0 <usb_disconnect+88/128>
Trace; c01f539e <usb_hub_port_connect_change+4a/20c>
Trace; c01f565d <usb_hub_events+fd/29c>
Trace; c01f584b <usb_hub_thread+4f/f4>
Trace; c0105a54 <arch_kernel_thread+28/38>
Code; ed341d05 <[usbserial]usb_serial_disconnect+6d/1ec>
00000000 <_EIP>:
Code; ed341d05 <[usbserial]usb_serial_disconnect+6d/1ec> <=====
0: c7 80 a4 09 00 00 00 movl $0x0,0x9a4(%eax) <=====
Code; ed341d0c <[usbserial]usb_serial_disconnect+74/1ec>
7: 00 00 00
Code; ed341d0f <[usbserial]usb_serial_disconnect+77/1ec>
a: 8d 4b 5c lea 0x5c(%ebx),%ecx
Code; ed341d12 <[usbserial]usb_serial_disconnect+7a/1ec>
d: f0 ff 43 5c lock incl 0x5c(%ebx)
Code; ed341d16 <[usbserial]usb_serial_disconnect+7e/1ec>
11: 0f 8e ae 00 00 00 jle c5 <_EIP+0xc5> ed341dca <[usbserial]usb_serial_disconnect+132/1ec>
Module list:
nfsd 67264 12
visor 10624 0
usbserial 16224 0 [visor]
microcode 3744 0 (autoclean)
mousedev 3904 1
lvm-mod 59680 9
quota_v2 6376 2
nfs 69372 5
lockd 47648 1 [nfsd nfs]
sunrpc 65396 1 [nfsd nfs lockd]
vfat 9308 0 (unused)
msdos 4828 0
fat 29944 0 [vfat msdos]
isofs 17408 0 (unused)
udf 79392 0 (unused)
eeprom 3520 0 (unused)
mtp008 8064 0 (unused)
i2c-proc 5952 0 [eeprom mtp008]
i2c-viapro 3848 0 (unused)
i2c-core 12192 0 [eeprom mtp008 i2c-proc i2c-viapro]
syncfb 12098 0 (unused)
matroxfb_base 19040 63
matroxfb_DAC1064 5312 0 [matroxfb_base]
matroxfb_accel 7264 0 [matroxfb_base matroxfb_DAC1064]
matroxfb_misc 14528 0 [matroxfb_base matroxfb_DAC1064 matroxfb_accel]fbcon-cfb24 4192 0 [matroxfb_accel]
fbcon-cfb8 3264 0 [matroxfb_accel]
fbcon-cfb32 3616 0 [matroxfb_accel]
fbcon-cfb16 3904 0 [matroxfb_accel]
mga_vid 8256 0
mga 98576 1
agpgart 17696 3
emu10k1 56512 2
sound 52940 0 [emu10k1]
ac97_codec 11648 0 [emu10k1]
soundcore 3460 7 [emu10k1 sound]
apm 9504 0
softdog 1764 1
loop 8624 0
floppy 47072 0
sg 25092 0 (unused)
sr_mod 11896 0
cdrom 26976 0 [sr_mod]
st 27344 0
3c59x 25864 1
af_packet 13096 0 (unused)
^ permalink raw reply [flat|nested] 7+ messages in thread* Re: Oops in vanilla 2.4.22 serial-usb driver
2003-09-25 4:17 Oops in vanilla 2.4.22 serial-usb driver Philippe Troin
@ 2003-09-25 18:50 ` Greg KH
2003-09-25 20:27 ` Philippe Troin
2003-09-26 18:20 ` Philippe Troin
0 siblings, 2 replies; 7+ messages in thread
From: Greg KH @ 2003-09-25 18:50 UTC (permalink / raw)
To: Philippe Troin; +Cc: linux-kernel
On Wed, Sep 24, 2003 at 09:17:00PM -0700, Philippe Troin wrote:
> This happened at the end of a Palm sync.
> The machine went on, but USB is not irresponsive to USB attach/detach
> since khubd is dead. The USB low-level driver is UHCI_ALT, compiled
> in-kernel.
This should be fixed in the 2.4.23-pre tree now. If you want, you can
try applying the patch at:
http://www.kernel.org/pub/linux/kernel/people/gregkh/usb/2.4/usb-serial-02-2.4.23-pre3.patch
if you don't want the whole -pre tree.
> BTW, is there any way to restart khubd without rebooting?
Nope, sorry.
Let me know if this doesn't solve the problem for you.
thanks,
greg k-h
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Oops in vanilla 2.4.22 serial-usb driver
2003-09-25 18:50 ` Greg KH
@ 2003-09-25 20:27 ` Philippe Troin
2003-09-25 21:01 ` Greg KH
2003-09-26 18:20 ` Philippe Troin
1 sibling, 1 reply; 7+ messages in thread
From: Philippe Troin @ 2003-09-25 20:27 UTC (permalink / raw)
To: Greg KH; +Cc: linux-kernel
Greg KH <greg@kroah.com> writes:
> On Wed, Sep 24, 2003 at 09:17:00PM -0700, Philippe Troin wrote:
> > This happened at the end of a Palm sync.
> > The machine went on, but USB is not irresponsive to USB attach/detach
> > since khubd is dead. The USB low-level driver is UHCI_ALT, compiled
> > in-kernel.
>
> This should be fixed in the 2.4.23-pre tree now. If you want, you can
> try applying the patch at:
> http://www.kernel.org/pub/linux/kernel/people/gregkh/usb/2.4/usb-serial-02-2.4.23-pre3.patch
> if you don't want the whole -pre tree.
That's what I had figured out from looking at the 23rcX changelogs and
diffs.
> > BTW, is there any way to restart khubd without rebooting?
>
> Nope, sorry.
Are there any technical reasons behind that, or that just that it is
not implemented?
> Let me know if this doesn't solve the problem for you.
I won't be able to test until later today, but I will let you know.
Thanks,
Phil.
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Oops in vanilla 2.4.22 serial-usb driver
2003-09-25 20:27 ` Philippe Troin
@ 2003-09-25 21:01 ` Greg KH
2003-09-25 22:31 ` Philippe Troin
0 siblings, 1 reply; 7+ messages in thread
From: Greg KH @ 2003-09-25 21:01 UTC (permalink / raw)
To: Philippe Troin; +Cc: linux-kernel
On Thu, Sep 25, 2003 at 01:27:57PM -0700, Philippe Troin wrote:
> > > BTW, is there any way to restart khubd without rebooting?
> >
> > Nope, sorry.
>
> Are there any technical reasons behind that, or that just that it is
> not implemented?
It's a bit hard to restart a kernel thread that is oopsed :)
greg k-h
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Oops in vanilla 2.4.22 serial-usb driver
2003-09-25 21:01 ` Greg KH
@ 2003-09-25 22:31 ` Philippe Troin
2003-09-25 22:44 ` Greg KH
0 siblings, 1 reply; 7+ messages in thread
From: Philippe Troin @ 2003-09-25 22:31 UTC (permalink / raw)
To: Greg KH; +Cc: linux-kernel
Greg KH <greg@kroah.com> writes:
> On Thu, Sep 25, 2003 at 01:27:57PM -0700, Philippe Troin wrote:
> > > > BTW, is there any way to restart khubd without rebooting?
> > >
> > > Nope, sorry.
> >
> > Are there any technical reasons behind that, or that just that it is
> > not implemented?
>
> It's a bit hard to restart a kernel thread that is oopsed :)
Yes, but still, with a completely modular USB subsystem, removing all
the modules and reinsrting them (when possible) restarts khubd... So
if it is possible with modules, it ought to be possible with
monolithic USB...
Phil.
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Oops in vanilla 2.4.22 serial-usb driver
2003-09-25 22:31 ` Philippe Troin
@ 2003-09-25 22:44 ` Greg KH
0 siblings, 0 replies; 7+ messages in thread
From: Greg KH @ 2003-09-25 22:44 UTC (permalink / raw)
To: Philippe Troin; +Cc: linux-kernel
On Thu, Sep 25, 2003 at 03:31:25PM -0700, Philippe Troin wrote:
> Greg KH <greg@kroah.com> writes:
>
> > On Thu, Sep 25, 2003 at 01:27:57PM -0700, Philippe Troin wrote:
> > > > > BTW, is there any way to restart khubd without rebooting?
> > > >
> > > > Nope, sorry.
> > >
> > > Are there any technical reasons behind that, or that just that it is
> > > not implemented?
> >
> > It's a bit hard to restart a kernel thread that is oopsed :)
>
> Yes, but still, with a completely modular USB subsystem, removing all
> the modules and reinsrting them (when possible) restarts khubd... So
> if it is possible with modules, it ought to be possible with
> monolithic USB...
Usually when khubd oopses like this, a usb module is stuck with a
incremented reference count which prevents the usbcore from being able
to be unloaded.
But hey, patches are always accepted :)
thanks,
greg k-h
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Oops in vanilla 2.4.22 serial-usb driver
2003-09-25 18:50 ` Greg KH
2003-09-25 20:27 ` Philippe Troin
@ 2003-09-26 18:20 ` Philippe Troin
1 sibling, 0 replies; 7+ messages in thread
From: Philippe Troin @ 2003-09-26 18:20 UTC (permalink / raw)
To: Greg KH; +Cc: linux-kernel
Greg KH <greg@kroah.com> writes:
> On Wed, Sep 24, 2003 at 09:17:00PM -0700, Philippe Troin wrote:
> > This happened at the end of a Palm sync.
> > The machine went on, but USB is not irresponsive to USB attach/detach
> > since khubd is dead. The USB low-level driver is UHCI_ALT, compiled
> > in-kernel.
>
> This should be fixed in the 2.4.23-pre tree now. If you want, you can
> try applying the patch at:
> http://www.kernel.org/pub/linux/kernel/people/gregkh/usb/2.4/usb-serial-02-2.4.23-pre3.patch
> if you don't want the whole -pre tree.
I confirm that this patch fixes the problem.
Thanks Greg.
Phil.
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2003-09-26 18:20 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
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2003-09-25 4:17 Oops in vanilla 2.4.22 serial-usb driver Philippe Troin
2003-09-25 18:50 ` Greg KH
2003-09-25 20:27 ` Philippe Troin
2003-09-25 21:01 ` Greg KH
2003-09-25 22:31 ` Philippe Troin
2003-09-25 22:44 ` Greg KH
2003-09-26 18:20 ` Philippe Troin
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